Improved composition for pavements, roofing, and other purposes



.vented a new and useful compositioniorpave lllllll UNITED STATES J. CLARKE nn FRENCH,

IMPROVED COMPOSITION FOR PAVEMENTS, ROOFING, AND OTH ER- PURPOSES.

PATEnT Qrrrcn.

on SYRACUSE, NEW YORK.

I Specification forming part of Letters Patent No. 34,404, dated February 18,1862.

To all whom it may concern Be it known that we, J osnrn CLARKE and DAVID FRENCH, of Syracuse, in the county of Onondaga and State of New York, have inments, walks, cellar-bottoms, cisterns, roofs, and other analogous purposes, which has not been known or used 'before; and we do hereby declare that the following is a full, clear, and exact description thereof.

Our invention consists in a new cement composition, such as hereinafter fully described.

To enableg those skilled in the art to make and use our invention, we will proceed to describe the same. i

We take broken stone, coarse gravel,coarse sand, coal-ashes, coal-tar, pulverized rosin, quickli'me, fnydraulic cement, (or water-lime,) with leach-ashes, and mix well together in aboutthe following proportions: broken stone, five parts; gravel, six parts coarse sand,four parts; coal-ashes," two parts; coal-tar, two parts; pulverized rosin, one part; quicklime,

one part; hydraulic cement, three parts; leachashes, one part. After this composition has, been thoroughly amalgamated and worked'into a perfectly plastic state it is ready for use, and may be applied to the lining of cisterns,roofing, &c. This mixture,when dry, forms a composition which is exceedinglyhard and impervions to water or dampness, while at the same time it is to some degree elastic, and is not liable to be afl'ected by frost or changes of compositions used previous to our invention.

Our new composition is admirably adapted V to forming sidewalks or pavements; Being laid in a green state, it is formed and fashioned to I suit the will, when itdries and becomes set, and constitutes a permanent surface unaffected by, exposure or frost.

It will be understood that the proportions of the ingredients may be varied without departing from our invention.

Havingdescribed our new composition, what we claim as our invention, and desire to secure by Letters Patent, is-

The within-described composition, substan-J tially as and for the purposes set-forth,

v In testimony whereof we have hereuntoset our hands and afiixed our seals this-15th day;

of November, 1861. ii JOSEPH CLARKE. [L s.],

DAVID FRENCH, {13. s. Witnesses:

J. HUME;

a. B; CALDWELL, 

